Space advocacy

Space advocacy is a political position that favors the exploration, utilization, and colonization of outer space.

Practice

These organizations are noted for developing theories and actually putting them into practice through projects, as well as space advocacy.

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• The Mars Society promotes Robert Zubrin's Mars Direct plan and settlement of Mars, has many international volunteer-run projects http://www.marssociety.org/
• The Space Studies Institute was founded by Gerard K. O'Neill to fund the study of space habitats, built several mass driver prototypes http://www.ssi.org/
• The Planetary Society claims to be the largest space interest group, emphasis on robotic exploration and the search for extraterrestrial life, recent solar sail construction and attempted lanch http://www.planetary.org/